Read the following passage and mark the letter A, B, C, or D on your answer sheet to choose the word or phrase that best fits each of the numbered blanks from 25 to 29  

      Crocodiles are the world's largest reptiles. Some species of other animals have become (25) ___________ but the crocodiles have not experienced such a fate. All 23 species of the crocodiles are still surviving. There are two types of crocodiles found in Australia, freshwater and estuarine. Their long jaws, protective armor, streamlined bodies and long tails make them very suitable for living in aquatic (26) ___________ like swamps and rivers. Crocodiles are cold blooded. Their body temperature changes (27) ___________ the temperature of the air, water and land of its surroundings. Freshwater crocodiles can be found at the rivers and swamps in some parts of Australia. They have narrow snout and reasonably straight jawline with even-sized teeth. Unlike the estuarine crocodiles, they are not 'man-eaters' and (28) ___________ mainly on insects, frogs, lizards, turtles, with bats, birds and small mammals. The estuarine crocodiles, (29) ___________, are found mainly in the warm climate of Sri Lanka, India, Myanmar as well as other some countries in Southeast Asia and Australia. They have broader snouts than freshwater crocodiles, with an uneven 'up and down' jawline and irregular-sized teeth. It is estimated that they can live for at least 70 to 100 years.  

(Source: englishdaily626.com)